package atm;

import java.util.Scanner;

/**
 * 方法版本的ATM
 */
public class ATM04 {
    public static Scanner sc = new Scanner(System.in);
    public static String[][] users = {
            {"zyd1", "1", "1000"},
            {"zyd2", "2", "2000"},
            {"zyd3", "3", "3000"},
            {"zyd4", "4", "4000"},
            {"zyd5", "5", "5000"}
    };
    public static int index;


    /**
     * 主流程方法
     */
    public static void process() {

        System.out.println("欢迎使用雨滴银行");
        login();
        menu();
    }

    /**
     * 登录
     */
    public static void login() {
        for (int i = 0; i < 3; i++) {
            // 登录判断
            System.out.println("请输入账号：");
            String account = sc.next();
            System.out.println("请输入密码：");
            String pwd = sc.next();
            boolean isLogin = false;
            for (int j = 0; j < users.length; j++) {
                if (users[j][0].equals(account) && users[j][1].equals(pwd)) {
                    System.out.println("登录成功");
                    isLogin = true;
                    index = j;
                    break;
                }
            }
            if (isLogin) {
                break;
            } else {
                System.out.println("登录失败，还剩" + (2 - i) + "次");
                if (i == 2) {
                    System.out.println("卡已被吞");
                    System.exit(0);
                }
            }


        }


    }

    /**
     * 菜单
     */
    public static void menu() {
        while (true) {
            // 如果登录成功，进入菜单页面
            System.out.println("请选择：1-存款 2-取款 3-查询 4-转账 5-修改密码 6-切换账号 7-退出");
            int input = sc.nextInt();
            if (input == 1) {
                save();
            }
            if (input == 2) {
                get();
            }
            if (input == 3) {
                search();
            }
            if (input == 4) {
                transfer();
            }
            if (input == 5) {
                changePwd();

            }
            if (input == 6) {
                login();

            }
            if (input == 7) {

                System.out.println("再见");
                System.exit(0);
            }
        }
    }

    /**
     * 存款
     */
    public static void save() {
        System.out.println("请输入存的金额：");
        double blance = sc.nextDouble();
        users[index][2] = Double.parseDouble(users[index][2]) + blance + "";
        System.out.println("存款成功");
    }

    /**
     * 取款
     */
    public static void get() {
        System.out.println("请输入取款的金额：");
        double blance = sc.nextDouble();
        if (blance > Double.parseDouble(users[index][2])) {
            System.out.println("余额不足");
        } else {
            users[index][2] = Double.parseDouble(users[index][2]) - blance + "";
            System.out.println("取款成功");
        }

    }

    /**
     * 查询余额
     */
    public static void search() {
        System.out.println("您的余额为：" + users[index][2]);

    }

    /**
     * 转账
     */
    public static void transfer() {
        while (true) {
            System.out.println("请输入对方账号：");
            String otherAccount = sc.next();
            // 不能转账给自己
            if (otherAccount.equals(users[index][0])) {
                System.out.println("不能转给自己");
                continue;
            }
            // 判断对方账号是否存在
            boolean isExist = false;
            int otherIndex = 0;
            for (int i = 0; i < users.length; i++) {
                if (users[i][0].equals(otherAccount)) {
                    isExist = true;
                    otherIndex = i;
                    break;
                }
            }
            if (!isExist) {
                System.out.println("输入的对方账号错误");
                continue;
            }
            System.out.println("请输入转账金额：");
            double blance = sc.nextDouble();
            // 判断余额是否足够
            if (blance > Double.parseDouble(users[index][2])) {
                System.out.println("余额不足");
                continue;
            }
            // 从当前账号上扣去转账的金额
            users[index][2] = Double.parseDouble(users[index][2]) - blance + "";
            // 将转账的金额加在对方账号上
            users[otherIndex][2] = Double.parseDouble(users[otherIndex][2]) + blance + "";

            System.out.println("转账成功");
            break;

        }
    }



    /**
     * 修改密码
     * @return
     */
    public static void changePwd() {
        for (int i = 0; i < 3; i++) {
            // 登录判断
            System.out.println("请输入旧密码：");
            String y = sc.next();
            boolean isLogin = false;
            for (int j = 0; j < users.length; j++) {
                if ( users[j][1].equals(y)) {
                    System.out.println("密码验证成功");
                    isLogin = true;
                    index = j;
                    break;
                }

            }
            if (isLogin) {
                break;
            } else {
                System.out.println("密码错误，还剩" + (2 - i) + "次");
                if (i == 2) {
                    System.out.println("密码错误");
                    System.exit(0);
                }
            }
        }
        System.out.println("请输入新密码:");
        String d = sc.next();
        System.out.println("请再次输入新密码:");
        String c = sc.next();
        if (d.equals(c)){
            users[index][1] = d;
            System.out.println("修改成功! 请重新登录");
            process();
        }else {
            System.out.println("两次密码不正确! 请重新输入");
            changePwd();
        }

}


    public static void main(String[] args) {
        process();
    }
}

